Anti-rusting high-magnesium aluminum alloy round ingot and manufacturing method thereof

Abstract

The invention discloses an anti-rusting high-magnesium aluminum alloy round ingot and a manufacturing method thereof and relates to an aluminum alloy round ingot and a manufacturing method thereof. The invention aims to solve the problem that the anti-rusting high-magnesium aluminum alloy round ingot is low in yield. The ingot mainly comprises the following elements: 0.40-0.8% of Mn, 8.3-9.6% of Mg, 0.004-0.05% of Sb and 0.05-0.15% of Ti. The preparation method comprises the following steps: weighing raw materials, charging and smelting according to a sequence, performing convective mixing, introducing into a holding furnace of a resistance reflection furnace, refining argon-chlorine mixed gases, standing, degassing, and finally casting the ingot. The yield of the ingot disclosed by the invention exceeds 85%, and the problem that an ingot prepared by the conventional method is low in yield is solved. The corrosion resistance and thermal crack resistance of the alloy are improved, and crack tendency is reduced. The preparation method in the invention is applicable to preparation of the anti-rusting high-magnesium aluminum alloy round ingot.

Description

Technical field

[0001] The invention relates to a rust-proof high-magnesium aluminum alloy round ingot and a manufacturing method thereof. Background technique

[0002] The rust-proof high-magnesium aluminum alloy is an Al-Mg-Mn series of rust-proof aluminum. The alloy is used for corrosion-resistant, weldable, and load-bearing components, such as skins, frameworks, and bulletproof materials. It has high strength and good Stress corrosion resistance and spalling resistance, good quenching sensitivity, compressive stress resistance and other advantages. However, due to the complex chemical composition, complex phase composition and high Mg element content of this alloy, the Mg element burns severely during the smelting process. Therefore, in the past production, the Mg element content of the sample after the furnace did not meet the standard requirements, resulting in the whole furnace being scrapped. Moreover, it shows a great tendency to crack during casting. The range of melti...

Examples

specific Embodiment approach 1

[0032] Specific embodiment 1: The mass percentage of elements in the rust-proof high-magnesium aluminum alloy round ingot of this embodiment is: Si less than 0.30%, Fe less than 0.30%, Cu less than 0.05%, Mn: 0.40% to 0.8%, Mg: 8.3 %~9.6%, Ni less than 0.10%, Sb: 0.004%~0.05%, Zn less than 0.20%, Ti: 0.05~0.15%, Be less than 0.005% and Al as the balance; among them, Si, Fe, Cu, Ni and Zn is an impurity element.

[0033] The principle and beneficial effects of this embodiment are:

[0034] 1. According to the characteristics of different alloys, this embodiment chooses different adding timings, which solves the problem of full alloying of various elements and reduces the waste of chemical composition; the refining of mixed gas of argon and chlorine can effectively reduce Na and Ca in the melt. , Li, K and other alkali and alkaline earth metals; transfer the melt to the online degassing device, which can effectively remove H in the melt 2 The melt is transferred to the filter device...

specific Embodiment approach 2

[0040] Specific embodiment 2: The method for manufacturing the rust-proof high-magnesium aluminum alloy round ingot of this embodiment is carried out in the following steps:

[0041] 1. According to mass percentage, Si is less than 0.30%, Fe is less than 0.30%, Cu is less than 0.05%, Mn: 0.40% to 0.8%, Mg: 8.3% to 9.6%, Ni is less than 0.10%, Sb: 0.004% to 0.05%, Zn is less than 0.20%, Ti: 0.05~0.15%, Be is less than 0.005% and the balance of Al Weigh remelted aluminum ingots, metal Mg, Al-5Sb master alloy, Al-10Mn master alloy, Al-6Ti master alloy and Al -3Be master alloy as smelting raw material;

[0042] 2. Put the remelted aluminum ingots weighed in step 1 into the resistance reverberatory furnace, then add Al-10Mn master alloy and Al-6Ti master alloy into the resistance reverberatory furnace, and heat the resistance reverberatory furnace to 730~750℃ , And then add the metal Mg, Al-5Sb master alloy and Al-3Be master alloy to the resistance reverberatory furnace in order, and c...

specific Embodiment approach 3

[0051] Specific embodiment three: This embodiment is different from specific embodiment or two in that the Sb content in the Al-5Sb master alloy in step one is 5%, and the rest is Al; the Mn content in the Al-10Mn master alloy is 10%, The rest is Al; the Ti content in the Al-6Ti master alloy is 6%, and the rest is Al; the Be content in the Al-3Be master alloy is 3%, and the rest is Al. Other steps and parameters are the same as in the second embodiment.

Technical field

[0001] The invention relates to a rust-proof high-magnesium aluminum alloy round ingot and a manufacturing method thereof. Background technique

[0002] The rust-proof high-magnesium aluminum alloy is an Al-Mg-Mn series of rust-proof aluminum. The alloy is used for corrosion-resistant, weldable, and load-bearing components, such as skins, frameworks, and bulletproof materials. It has high strength and good Stress corrosion resistance and spalling resistance, good quenching sensitivity, compressive stress resistance and other advantages. However, due to the complex chemical composition, complex phase composition and high Mg element content of this alloy, the Mg element burns severely during the smelting process. Therefore, in the past production, the Mg element content of the sample after the furnace did not meet the standard requirements, resulting in the whole furnace being scrapped. Moreover, it shows a great tendency to crack during casting. The range of melti...

Examples

specific Embodiment approach 1

[0032] Specific embodiment 1: The mass percentage of elements in the rust-proof high-magnesium aluminum alloy round ingot of this embodiment is: Si less than 0.30%, Fe less than 0.30%, Cu less than 0.05%, Mn: 0.40% to 0.8%, Mg: 8.3 %~9.6%, Ni less than 0.10%, Sb: 0.004%~0.05%, Zn less than 0.20%, Ti: 0.05~0.15%, Be less than 0.005% and Al as the balance; among them, Si, Fe, Cu, Ni and Zn is an impurity element.

[0033] The principle and beneficial effects of this embodiment are:

[0034] 1. According to the characteristics of different alloys, this embodiment chooses different adding timings, which solves the problem of full alloying of various elements and reduces the waste of chemical composition; the refining of mixed gas of argon and chlorine can effectively reduce Na and Ca in the melt. , Li, K and other alkali and alkaline earth metals; transfer the melt to the online degassing device, which can effectively remove H in the melt 2 The melt is transferred to the filter device...

specific Embodiment approach 2

[0040] Specific embodiment 2: The method for manufacturing the rust-proof high-magnesium aluminum alloy round ingot of this embodiment is carried out in the following steps:

[0041] 1. According to mass percentage, Si is less than 0.30%, Fe is less than 0.30%, Cu is less than 0.05%, Mn: 0.40% to 0.8%, Mg: 8.3% to 9.6%, Ni is less than 0.10%, Sb: 0.004% to 0.05%, Zn is less than 0.20%, Ti: 0.05~0.15%, Be is less than 0.005% and the balance of Al Weigh remelted aluminum ingots, metal Mg, Al-5Sb master alloy, Al-10Mn master alloy, Al-6Ti master alloy and Al -3Be master alloy as smelting raw material;

[0042] 2. Put the remelted aluminum ingots weighed in step 1 into the resistance reverberatory furnace, then add Al-10Mn master alloy and Al-6Ti master alloy into the resistance reverberatory furnace, and heat the resistance reverberatory furnace to 730~750℃ , And then add the metal Mg, Al-5Sb master alloy and Al-3Be master alloy to the resistance reverberatory furnace in order, and c...

specific Embodiment approach 3

[0051] Specific embodiment three: This embodiment is different from specific embodiment or two in that the Sb content in the Al-5Sb master alloy in step one is 5%, and the rest is Al; the Mn content in the Al-10Mn master alloy is 10%, The rest is Al; the Ti content in the Al-6Ti master alloy is 6%, and the rest is Al; the Be content in the Al-3Be master alloy is 3%, and the rest is Al. Other steps and parameters are the same as in the second embodiment.